Chapter 3: Q58. (page 135)

Evaluate each expression if $x = - 2, y = 6,$ and $z = 5$ .
58. $2 x - y + 3 z$ .

Short Answer

Expert verified

The value of $2 x - y + 3 z$ is 5.

Step by step solution

– Use the substitution method to find the value of 2x-y+3z.

Substitute $x = - 2, y = 6$ and $z = 5$ in $2 x - y + 3 z$ .

$x + y + z = (- 2) + 6 + 5$

– By applying the order of operations simplify the value of 2x-y+3z

$\begin{matrix} 2 x - y + 3 z = 2 (- 2) - 6 + 3 (5) \\ = - 4 - 6 + 15 Simplifytheparanthesis \\ = - 10 + 15 Dotheaddition \\ = 5 Dothesubtraction \end{matrix}$

– Conclusion

By substituting the values $x = - 2, y = 6$ and $z = 5$ in $2 x - y + 3 z$ , the value of the expression is 5.

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Evaluate each expression if $x = - 2, y = 6,$ and $z = 5$ .
58. $2 x - y + 3 z$ .

Short Answer

Step by step solution

– Use the substitution method to find the value of 2x-y+3z.

– By applying the order of operations simplify the value of 2x-y+3z

– Conclusion

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Evaluate each expression if x=-2,y=6,and z=5.58.2x-y+3z.

Short Answer

Step by step solution

– Use the substitution method to find the value of 2x-y+3z.

– By applying the order of operations simplify the value of 2x-y+3z

– Conclusion

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Pure Maths

Theoretical and Mathematical Physics

Mechanics Maths

Logic and Functions

Calculus

Decision Maths

Study anywhere. Anytime. Across all devices.

Evaluate each expression if $x = - 2, y = 6,$ and $z = 5$ .
58. $2 x - y + 3 z$ .